Mercurial > hg > truffle
view src/share/vm/oops/oopsHierarchy.hpp @ 15713:b68907673c8e
[inlining] shorter and equally informative, logNotInlined vs logNotInlinedMethod
author | Miguel Garcia <miguel.m.garcia@oracle.com> |
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date | Fri, 16 May 2014 15:28:00 +0200 |
parents | 190899198332 |
children |
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/* * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_OOPS_OOPSHIERARCHY_HPP #define SHARE_VM_OOPS_OOPSHIERARCHY_HPP #include "runtime/globals.hpp" #include "utilities/globalDefinitions.hpp" // OBJECT hierarchy // This hierarchy is a representation hierarchy, i.e. if A is a superclass // of B, A's representation is a prefix of B's representation. typedef juint narrowOop; // Offset instead of address for an oop within a java object // If compressed klass pointers then use narrowKlass. typedef juint narrowKlass; typedef void* OopOrNarrowOopStar; typedef class markOopDesc* markOop; #ifndef CHECK_UNHANDLED_OOPS typedef class oopDesc* oop; typedef class instanceOopDesc* instanceOop; typedef class arrayOopDesc* arrayOop; typedef class objArrayOopDesc* objArrayOop; typedef class typeArrayOopDesc* typeArrayOop; #else // When CHECK_UNHANDLED_OOPS is defined, an "oop" is a class with a // carefully chosen set of constructors and conversion operators to go // to and from the underlying oopDesc pointer type. // // Because oop and its subclasses <type>Oop are class types, arbitrary // conversions are not accepted by the compiler. Applying a cast to // an oop will cause the best matched conversion operator to be // invoked returning the underlying oopDesc* type if appropriate. // No copy constructors, explicit user conversions or operators of // numerical type should be defined within the oop class. Most C++ // compilers will issue a compile time error concerning the overloading // ambiguity between operators of numerical and pointer types. If // a conversion to or from an oop to a numerical type is needed, // use the inline template methods, cast_*_oop, defined below. // // Converting NULL to oop to Handle implicit is no longer accepted by the // compiler because there are too many steps in the conversion. Use Handle() // instead, which generates less code anyway. class Thread; class PromotedObject; class oop { oopDesc* _o; void register_oop(); void unregister_oop(); // friend class markOop; public: void set_obj(const void* p) { raw_set_obj(p); if (CheckUnhandledOops) register_oop(); } void raw_set_obj(const void* p) { _o = (oopDesc*)p; } oop() { set_obj(NULL); } oop(const oop& o) { set_obj(o.obj()); } oop(const volatile oop& o) { set_obj(o.obj()); } oop(const void* p) { set_obj(p); } ~oop() { if (CheckUnhandledOops) unregister_oop(); } oopDesc* obj() const volatile { return _o; } // General access oopDesc* operator->() const { return obj(); } bool operator==(const oop o) const { return obj() == o.obj(); } bool operator==(void *p) const { return obj() == p; } bool operator!=(const volatile oop o) const { return obj() != o.obj(); } bool operator!=(void *p) const { return obj() != p; } bool operator<(oop o) const { return obj() < o.obj(); } bool operator>(oop o) const { return obj() > o.obj(); } bool operator<=(oop o) const { return obj() <= o.obj(); } bool operator>=(oop o) const { return obj() >= o.obj(); } bool operator!() const { return !obj(); } // Assignment oop& operator=(const oop& o) { _o = o.obj(); return *this; } #ifndef SOLARIS volatile oop& operator=(const oop& o) volatile { _o = o.obj(); return *this; } #endif volatile oop& operator=(const volatile oop& o) volatile { _o = o.obj(); return *this; } // Explict user conversions operator void* () const { return (void *)obj(); } #ifndef SOLARIS operator void* () const volatile { return (void *)obj(); } #endif operator HeapWord* () const { return (HeapWord*)obj(); } operator oopDesc* () const { return obj(); } operator intptr_t* () const { return (intptr_t*)obj(); } operator PromotedObject* () const { return (PromotedObject*)obj(); } operator markOop () const { return markOop(obj()); } operator address () const { return (address)obj(); } // from javaCalls.cpp operator jobject () const { return (jobject)obj(); } // from javaClasses.cpp operator JavaThread* () const { return (JavaThread*)obj(); } #ifndef _LP64 // from jvm.cpp operator jlong* () const { return (jlong*)obj(); } #endif // from parNewGeneration and other things that want to get to the end of // an oop for stuff (like ObjArrayKlass.cpp) operator oop* () const { return (oop *)obj(); } }; #define DEF_OOP(type) \ class type##OopDesc; \ class type##Oop : public oop { \ public: \ type##Oop() : oop() {} \ type##Oop(const oop& o) : oop(o) {} \ type##Oop(const volatile oop& o) : oop(o) {} \ type##Oop(const void* p) : oop(p) {} \ operator type##OopDesc* () const { return (type##OopDesc*)obj(); } \ type##OopDesc* operator->() const { \ return (type##OopDesc*)obj(); \ } \ type##Oop& operator=(const type##Oop& o) { \ oop::operator=(o); \ return *this; \ } \ NOT_SOLARIS( \ volatile type##Oop& operator=(const type##Oop& o) volatile { \ (void)const_cast<oop&>(oop::operator=(o)); \ return *this; \ }) \ volatile type##Oop& operator=(const volatile type##Oop& o) volatile {\ (void)const_cast<oop&>(oop::operator=(o)); \ return *this; \ } \ }; DEF_OOP(instance); DEF_OOP(array); DEF_OOP(objArray); DEF_OOP(typeArray); #endif // CHECK_UNHANDLED_OOPS // For CHECK_UNHANDLED_OOPS, it is ambiguous C++ behavior to have the oop // structure contain explicit user defined conversions of both numerical // and pointer type. Define inline methods to provide the numerical conversions. template <class T> inline oop cast_to_oop(T value) { return (oop)(CHECK_UNHANDLED_OOPS_ONLY((void *))(value)); } template <class T> inline T cast_from_oop(oop o) { return (T)(CHECK_UNHANDLED_OOPS_ONLY((void*))o); } // The metadata hierarchy is separate from the oop hierarchy // class MetaspaceObj class ConstMethod; class ConstantPoolCache; class MethodData; // class Metadata class Method; class ConstantPool; // class CHeapObj class CompiledICHolder; // The klass hierarchy is separate from the oop hierarchy. class Klass; class InstanceKlass; class InstanceMirrorKlass; class InstanceClassLoaderKlass; class InstanceRefKlass; class ArrayKlass; class ObjArrayKlass; class TypeArrayKlass; #endif // SHARE_VM_OOPS_OOPSHIERARCHY_HPP